3. Look at one side, guess the answer, flip it over to check the answer

Therio - Bovine - Obstetrics & Dystocia 1

Abnormal birth is called

Dystocia

Normal birth is called

Eutocia

What are the 3 kinds of dystocia?

(1) 1° Inertia(2) Obstructive Dystocia(3) 2° Inertia

Explain dystocia due to 1° inertia

Forces that propel the fetus are absent

Explain obstructive dystocia

Forces that propel fetus are normal, but no progress of fetus through birth canal

Explain dystocia due to 2° inertia

Considered a complication of obstructive dystocia due to exhaustion of myometrium

What are some reasons there might be a dystocia due to 1° inertia?

(Forces that propel the fetus are absent) #1 cz is metabolic disturbances, esp Hypocalcemia!! However, can also be from Over/undernutrition, Fetal malformation (monsters), Uterine torsion, Uterine rupture, pain, or debility.

Partial or complete agenesis of the lumbar, sacral, & coccygeal area & accompanied by posterior bimelic arthrogryposis characterized by ankylosis of joints w/ associated malformations of the musculature.

What is a Bulldog calf?

Calf suffering from Dwarfism/chondrodysplasia

What is Schistosoma Reflexa?

Schistosomus reflexus occurs very early in embryological development. The abnormality is associated w/ severe developmental anomalies of the spinal column & consequent failure of the abdominal wall to close. The spine is bent dorsally so that the head & tail curve towards each other & the fetal viscera are free floating in the amnion.

What is Amorphus globosus?

Instead of a typically developing fetus occurs thereby to form 1 of hairy skin covered, more or less spherical structure, the shares of all 3 germ layers contains; the differentiation of its contents can vary greatly. Amorphus globosus is lack of fxnl organs not viable

(1) If less than the width of a hand, then Repair may not be necessary if small & dorsal due to rapid uterine involution, so just do Repeated Oxytocin Injxns + 7-10 days of ABx(2) If bigger than the width of a hand, then Often dystocia required C-section to repair uterus. Need to do 1 handed “Blind” suture closure, or you need to Prolapse uterus & repair (Using 10ml epinephrine in 250ml saline while tugging on caruncle)

What is the prog of a uterine rupture?

If uterine contents infected or if it happened some time ago the prognosis is poor

Who is more likely to have an Obstructive Dystocia- dairy or beef cow?

Beef

If you are concerned about obstructive dystocia, how would you choose your sire?

Low birth weight sire

How large must a heifer be before you breed her to avoid obstructive dystocia?

At least 60% of her adult mass

Which breed is well known for obstructive dystocias?

Belgian blues

What are the CSs of an obstructive dystocia?

Initially strong continuous but unproductive straining, a prolonged stage II (expulsion of fetus), which can lead to 2° inertia dystocia from myometrial exhaustion